JP2003129617A - Waterproofing sheet for repairing rooftop - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a waterproofing sheet for repairing the rooftop allowing easy handling and requiring no skill even when bonding it and a repair method for the rooftop by use of the same. SOLUTION: This invention relates to the waterproofing sheet for repairing the rooftop of a building having a peeling sheet divided into beltlike pieces by a plurality of substantially parallel cut lines and the repair method in which the waterproofing sheet for repair is bonded on the rooftop while peeling the beltlike pieces of the peeling sheet sequentially. Since this waterproofing sheet for repair allows the construction to be performed while a part other than a part corresponding to a section where the waterproofing sheet is currently bonded is covered with the peeling sheet, the waterproofing sheet is not bonded on an unexpected section, and, in particular, the workability is markedly improved in case of large size.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for waterproofing a building roof. More specifically, the present invention relates to a waterproofing method for a rooftop of a building which is simple in construction, requires no skill, and exhibits excellent waterproofness and light-shielding / heat-shielding properties.

[0002]

2. Description of the Related Art Leakage on rooftops of buildings and condominiums is a very serious problem. In many cases, indoor leak points and roof leak points are separated without a one-to-one correspondence, and it is very difficult to identify the leak point on the roof. Therefore, it is necessary to carry out waterproofing work for the entire roof when repairing water leaks.

Conventionally, as a rooftop waterproof repairing method, there is a method of applying a urethane paint or a glass fiber reinforced polyester resin, a method of attaching an asphalt sheet, a butyl / EPT rubber sheet or a polyvinyl chloride sheet.
However, these methods have problems that the work is complicated, the working environment is poor, the waterproof property is deteriorated over time, the adhesive strength with the rooftop is insufficient, and the light-shielding / heat-shielding properties of the building after construction are poor. was there.

In order to solve these problems, the present inventors have developed a renovation waterproof sheet for a rooftop of a building, in which a fluororesin film, an aluminum foil, a reinforcing film and an adhesive layer are laminated (Japanese Patent Laid-Open No. 11-1999). -310999). In this waterproof sheet, a release sheet provided on an adhesive layer is peeled off just before work and attached to a repaired place, and the above problems are almost solved. However, further improvement in workability has been desired. That is, since it can be repaired simply by pasting, the workability is significantly improved compared to the above-mentioned conventional technique, but after peeling the release sheet, the adhesive layer having a strong adhesive force is exposed, so that it is particularly large. In the case of the size, it was difficult to handle, and it took skill to attach it to a predetermined place cleanly as desired. Once pasted, the adhesive strength is large, so that it is difficult to re-stick for correction or the like, and even if it can be re-bonded, the adhesive strength will decrease this time.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide a rooftop waterproofing sheet that is easy to handle even in a large size and does not require any skill to attach it, and a rooftop repairing method using the same. .

[0006]

Means for Solving the Problems As a result of diligent studies, the present inventor has made a cut in a peeling sheet of a rooftop waterproofing sheet so that the sheet can be peeled off in a strip shape, so that the peeling sheet can be sequentially peeled off in correspondence with a pasted portion. The present invention has been completed based on the finding that the release sheet can be peeled off and the other part can be repaired very easily if the surface of the pressure-sensitive adhesive is protected and the attachment work is advanced.

That is, in the present invention, a fluororesin film, an aluminum foil, a reinforcing film, an adhesive layer and a release sheet are laminated, and the release sheet is divided into strips by a plurality of substantially parallel cuts, In a waterproofing sheet for building rooftop repair that can be individually peeled for each strip, and a waterproofing method on the building rooftop by sticking the above-mentioned waterproofing sheet on the building rooftop with a fluororesin film as the upper surface. In this modification method, the strip-shaped strips are sequentially peeled from one edge of the waterproof sheet in correspondence with the pasted portion and then pasted.

[0008]

DETAILED DESCRIPTION OF THE INVENTION The present invention will be described below with reference to the drawings.
FIG. 1 is a diagram showing the structure of the waterproof sheet of the present invention. In FIG. 1, 1 is a waterproof sheet of the present invention, 2 is a fluororesin film, 3 is an aluminum foil, 4 is a reinforcing film, 5 is an adhesive layer, and 6 is a release sheet.

The size of the waterproof sheet of the present invention is not particularly limited. However, since the object of the present invention is to improve the handling difficulty particularly in the case of a large size, the characteristics of the present invention are exerted when the size is large to some extent.
Usually, it is a long sheet with a width of 480 mm or more, and it is cut into an appropriate width according to the construction site, for example, 960 mm width and used.

The fluororesin 2 is polytetrafluoroethylene, tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer, tetrafluoroethylene / hexafluoropropylene copolymer, tetrafluoroethylene / ethylene copolymer, polychlorotriene. Fluoroethylene, chlorotrifluoroethylene / ethylene copolymer, polyvinylidene fluoride, polyvinyl fluoride and the like can be exemplified, and polyvinyl fluoride is preferable. The thickness of the fluororesin film is not particularly limited, but is usually 10 to 50 μm. The aluminum foil of No. 3 may be hard or soft. The thickness is not particularly limited, but is usually 7 to 100 μm.

As the reinforcing film of 4, for example, a polyethylene film, a resin film such as a polypropylene film, a polyester film, or a non-woven fabric is used. The thickness is not particularly limited, but the pressure-sensitive adhesive of 5 which is usually 7 to 100 μm may be one having an adhesive property to concrete or mortar on a building roof, for example, a butyl rubber if necessary a softening agent, A non-vulcanized butyl rubber-based pressure sensitive adhesive containing a tackifier, a filler and the like can be used. The thickness of the pressure-sensitive adhesive layer is not particularly limited, but is usually 0.1 to 1.2 mm.

Reference numeral 6 is a release sheet. Figure 1 shows the release sheet
As shown in FIGS. 3 to 3, a plurality of substantially parallel cuts are formed and divided into strips. Therefore, the surface of the pressure-sensitive adhesive can be exposed by peeling each strip. The interval between breaks may be appropriately determined in consideration of workability and is not particularly limited. Usually, it is 30 to 480 mm. The above waterproof sheet can be manufactured according to a known method. For example, a fluororesin film, an aluminum foil and a reinforcing film are dry laminated to form a three-layer laminated material, and a pressure sensitive adhesive is separately applied to a release sheet with a calendar roll or the like, and the release sheet is laminated with the three-layer laminated material. Finally, the release sheet can be manufactured by making parallel cuts by a known cutting means.

Next, the repairing method of the present invention will be described.
Buildings, condominiums, apartments, warehouses, roofs of various structures such as general houses are usually exposed with concrete, mortar, slate, waterproof layer, etc., and the method of the present invention is suitable for these cases. Yes, but it is also applicable to others. Before repairing, clean the roof surface in advance and repair any cracks or defects with sealing material or resin mortar. When the target rooftop has already been refurbished once or more and has a waterproof layer, the old waterproof layer may be peeled off, but the waterproof sheet of the present invention is light in weight and thus does not impose a heavy burden on the main body of the building. There is no problem even if it is not peeled off. It is desirable that the surface be smooth so that steps are not generated as much as possible. The surface is preferably dried as much as possible, and a water content of 8% by weight or less is particularly preferable.

Next, a primer is preferably applied to the rooftop surface. As the primer, a primer usually used in this technical field, for example, a urethane-based primer can be used. The primer is usually applied in an amount of 0.15 to 0.2 kg / m ^2, but the present invention is not limited to this. When the primer is sufficiently dried, the waterproof sheet 1 of the present invention is attached onto it. As shown in FIG. 3, the sticking is performed by peeling an appropriate number of strip-shaped strips on one end side of the waterproof sheet, for example, one to several strips, and repairing the end, for example, a rooftop. Stick it on the corner. At this time, it is advisable to press the air uniformly and strongly with a roller or the like so that the air is pushed out. Next, one to several strips of release sheet strips that are adjacent to each other in that order are peeled off and attached in the same manner. This is repeated sequentially.

When attaching the waterproof sheet, dust, foreign matter, wrinkles and air bubbles should be prevented as much as possible. The waterproof sheet and the joint portion of the waterproof sheet may be in contact with each other at their ends, but it is preferable to attach them so that one end overlaps with the other end. It is preferable that a joint tape is attached to the joint portion so that the end portion of the waterproof sheet is not exposed. By doing so, rainwater hardly penetrates from the joints and edges of the seat. The joint tape is composed of a fluororesin film, an aluminum foil, a reinforcing film, an adhesive layer, and a release material. The fluororesin film, the aluminum foil and the reinforcing film are the same as in the case of the waterproof sheet. Any adhesive may be used as long as it has adhesiveness to the fluororesin of the reinforcing film, and for example, an acrylic adhesive can be used. The thickness of the pressure-sensitive adhesive layer is not particularly limited, but is usually 0.01 to 1.2 mm. The release material is usually paper. The joint tape can be manufactured by a known method such as dry lamination or extrusion lamination.

Further, it is preferable to apply an edge sealer to the end portion of the joint tape because the resistance against peeling of the aluminum foil of the joint tape and the fluororesin film or the reinforcing film with time increases. As the edge sealer, for example, caulking material such as acrylic resin can be used.

[0017]

INDUSTRIAL APPLICABILITY The waterproof sheet of the present invention has excellent workability in terms of waterproofness, durability, light-shielding and heat-shielding properties, and can be easily and quickly repaired on the roof without requiring skill. That is, since the waterproof sheet can be constructed while being covered with the release sheet except for the part corresponding to the part to be actually attached, the unexpected part of the waterproof sheet does not stick to the unexpected part. , It is possible to focus the work on the pasted part without worrying about the parts other than the pasted part. In particular, in the case of a large size, the workability is remarkably improved as compared with the case where a conventional waterproof sheet is used. For example, the time required for repair work can be reduced to approximately 1 / 2-⅓. Moreover, since no skill is required, it is easy to arrange personnel for the construction work, and it is possible to reduce repair costs including personnel costs.

[0018]

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a waterproof sheet of the present invention.

FIG. 2 is a perspective view of the waterproof sheet of the present invention.

FIG. 3 is a diagram illustrating a repairing method of the present invention.

[Explanation of symbols]

1 tarpaulin 2 Fluororesin film 3 aluminum foil 4 Reinforcement film 5 Adhesive layer 6 Release sheet

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Yuki Okawa             1-15-9 Kamiookahigashi, Konan-ku, Yokohama-shi, Kanagawa F-term (reference) 4F100 AB10B AB33B AK04 AK07                       AK17A AK29 AK41 AN02                       AR00C BA05 BA07 BA10A                       BA10E DC22E DG15 GB07                       JD05 JL01 JL13D JL14E

Claims (2)

[Claims] 1. A fluororesin film, an aluminum foil,
Reinforcement film, pressure-sensitive adhesive layer and release sheet are laminated, and the release sheet is divided into strips by a plurality of substantially parallel cuts, and each strip can be peeled individually Tarpaulin. 2. A waterproofing method on a building roof, comprising: sticking the waterproof sheet according to claim 1 on a building roof with a fluororesin film as an upper surface; Corresponding to the above, a method for refurbishment is characterized in that the strip-shaped strips are sequentially peeled and attached.